Maker James Brown has supplied a invoice of supplies (BOM) for his newest rapidly-spinning volumetric 3D show, powered by a Raspberry Pi 4 and a pair of RGB LED panels, for these seeking to observe his footsteps on this planet of 3D persistence of imaginative and prescient (POV).
“Somebody constructing their very own voxel show acquired in contact asking for the BOM and I assumed that is perhaps of curiosity typically,” Brown writes of the parts listing. “It is a assortment of issues I had or might simply get in New Zealand, moderately than essentially the very best half for the job. If I made one other, I might change a few of it (lazy Susan bearing, finer pitch LED modules, shorter motor) however this configuration has not less than been proven to work.”
Brown has been experimenting with spinning 2D shows to create a 3D impact for a while, most just lately constructing a higher-resolution volumetric show able to rendering recognizable characters from Id Software program’s Doom. It is this for which Brown has listed the parts, together with its globular housing: a 400mm acrylic globe initially designed for backyard lights.
Elsewhere within the construct, a pair of 128×64 RGB LED matrices are related to a Raspberry Pi 4 Mannequin B single-board pc. “Simply wants one thing with Wi-Fi,” Brown notes, “and sufficient RAM for the voxel buffer.”
There is a customized interface to the LED matrices, a photointerrupter on one of many Raspberry Pi’s general-purpose enter/output (GPIO) pins for synchronisation, a slip ring constructed from alternator elements, a “no model pace controller,” timing belt, 115mm bearing, a counterweight of window lead, and a 100W 12V PSU.
“[The motor controller] shall be changed by a motor driver,” Brown writes of a future revision of the show, “related to a microcontroller speaking with the spinning [Raspberry] Pi by way of Bluetooth.”
Brown’s full BOM is on the market on this Mastodon thread.